Q. The number of diagonals that can be drawn in a polygon of 15 sides, is
A) 16
B) 60
C) 90
D) 80
Explanation
(c)
Number of vertices=15
$\therefore$ Number of lines${=^{15}C}_{2} = 105$
$\therefore$ Number of diagonals=105-15=90
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.